feat: upgrade to typeorm v0.3.0

[stelescuraul]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Update to be able to use typeorm >v0.3.0 and @nestjs/typeorm >v8.1.0.

• Update package dependencies
• Use typeorm datasource
• Don't allow destroy on RLSConnection
• Mark close as deprecated as it is in the base class
• Remove custom repositories from RLSModule to comply with nestjs/typeorm upstream
• Update tests to use new relation structure
• Add test for relationLoadStrategy: 'query'
• Add tests for all find operators (findOne, findOneBy, find, findBy)
• Update test utils to use DataSource

Type of change

Please select the options that are relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change which does not add functionality)

Checklist:

• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

BREAKING CHANGE: must use at least node v14, typeorm v0.3.0 and @nestjs/typeorm v8.1.0

[jifeon]

Thank you so much!

If public API of the lib was changed in any way?

[stelescuraul]

@jifeon The public api of the library will remain the same. I am trying to avoid large refactoring for organizations using this library. Instead I will be making backwards compatible changes (when needed). For now. nothing changes when using it.